10
dc1780abfa
DEMO MANUAL DC1780A-B
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
μ
COM
P
RUN
COM
P
CL
KOUT
_
U
2
CL
KOUT
_
U
3
VFB
PGOOD
RUN
VFB
TR
AC
K
P
GOOD
TR
AC
K
CO
M
P
CL
KO
UT
_
U
2
CL
KO
UT
_
U
3
RUN
VFB
P
GOOD
TR
A
C
K
VO
UT
INT
V
CC_
U3
VO
UT
VIN
EXT
VCC
INT
V
CC_
U3
INT
V
CC_U3
INT
V
CC_U3
SI
Z
E
DATE:
IC NO.
R
E
V
.
SHEET
O
F
TI
TLE:
AP
P
R
OVALS
PC
B
D
ES.
A
PP EN
G
.
TE
CHNO
LO
G
Y
)D[
0LOSLWDV&$ 3KRQH
0F&DUWK\%OYG
/7&&21),'(17,$/)25&86720(586(21/<
CUSTO
MER NO
TICE
L
INE
AR T
E
CHNO
L
O
G
Y
HAS
M
ADE
A BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-S
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
HO
WE
V
E
R,
IT
RE
M
A
IN
S
T
H
E
CUS
T
O
M
E
R'S
RE
S
P
O
N
S
IBI
L
IT
Y
T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
WI
T
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.l
inear
.c
om
1
'(02&,5&8,7$%
0RQGD\'HFHPEHU
3
4
+,*+()),&,(1&<32/<3+$6(
1$
/70(9
5%
JE
FF Z.
67(3'2:132:(502'8/(5(*8/$725
͗ͰW^WZK:d^ͰϭϳϴϬͰ^,ͰϭϳϴϬͲͰϭϳϴϬͲͺϬϬͺZsϭ͘^E
SI
Z
E
DATE:
IC NO.
R
E
V
.
SHEET
O
F
TI
TLE:
AP
P
R
OVALS
PC
B
D
ES.
A
PP EN
G
.
TE
CHNO
LO
G
Y
)D[
0LOSLWDV&$ 3KRQH
0F&DUWK\%OYG
/7&&21),'(17,$/)25&86720(586(21/<
CUSTO
MER NO
TICE
L
INE
AR T
E
CHNO
L
O
G
Y
HAS
M
ADE
A BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-S
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
HO
WE
V
E
R,
IT
RE
M
A
IN
S
T
H
E
CUS
T
O
M
E
R'S
RE
S
P
O
N
S
IBI
L
IT
Y
T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
WI
T
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.l
inear
.c
om
1
'(02&,5&8,7$%
0RQGD\'HFHPEHU
3
4
+,*+()),&,(1&<32/<3+$6(
1$
/70(9
5%
JE
FF Z.
67(3'2:132:(502'8/(5(*8/$725
͗ͰW^WZK:d^ͰϭϳϴϬͰ^,ͰϭϳϴϬͲͰϭϳϴϬͲͺϬϬͺZsϭ͘^E
SI
Z
E
DATE:
IC NO.
R
E
V
.
SHEET
O
F
TI
TLE:
AP
P
R
OVALS
PC
B
D
ES.
A
PP EN
G
.
TE
CHNO
LO
G
Y
)D[
0LOSLWDV&$ 3KRQH
0F&DUWK\%OYG
/7&&21),'(17,$/)25&86720(586(21/<
CUSTO
MER NO
TICE
L
INE
AR T
E
CHNO
L
O
G
Y
HAS
M
ADE
A BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-S
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
HO
WE
V
E
R,
IT
RE
M
A
IN
S
T
H
E
CUS
T
O
M
E
R'S
RE
S
P
O
N
S
IBI
L
IT
Y
T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
WI
T
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.l
inear
.c
om
1
'(02&,5&8,7$%
0RQGD\'HFHPEHU
3
4
+,*+()),&,(1&<32/<3+$6(
1$
/70(9
5%
JE
FF Z.
67(3'2:132:(502'8/(5(*8/$725
͗ͰW^WZK:d^ͰϭϳϴϬͰ^,ͰϭϳϴϬͲͰϭϳϴϬͲͺϬϬͺZsϭ͘^E
C1
6
(OP
T
)
C1
6
(OP
T
)
CO
UT
2
6
100uF 10V
1210
CO
UT
2
6
100uF 10V
1210
CO
UT
2
7
(OP
T
)
1210
CO
UT
2
7
(OP
T
)
1210
CO
UT
2
8
(OP
T
)
1210
CO
UT
2
8
(OP
T
)
1210
CIN1
3
22uF
25V
1210
CIN1
3
22uF
25V
1210
C1
9
1uF
10V
C1
9
1uF
10V
C1
7
(OP
T
)
C1
7
(OP
T
)
E15
SW
1-
3
E15
SW
1-
3
U3
LTM4620EV
U3
LTM4620EV
VOUT
1
A1
VOUT
1
A2
VOUT
1
A3
VOUT
1
A4
VOUT
1
A5
VOUT
1
B1
VOUT
1
B2
VOUT
1
B3
VOUT
1
B4
VOUT
1
B5
VOUT
1
C1
VOUT
1
C2
VOUT
1
C3
VOUT
1
C4
VF
B1
D5
SW
1
G2
PGOOD
1
G9
CO
M
P
1
E6
RUN1
F5
T
R
AC
K1
E5
VOU
T
1S
C5
VOU
T
2
A8
VOU
T
2
A9
VOU
T
2
A10
VOU
T
2
A11
VOU
T
2
A12
VOU
T
2
B8
VOU
T
2
B9
VOU
T
2
B10
VOU
T
2
B11
VOU
T
2
B12
VOU
T
2
C9
VOU
T
2
C1
0
VOU
T
2
C1
1
VOU
T
2
C1
2
VF
B2
D7
SW
2
G11
PGOOD
2
G8
CO
M
P
2
E7
RUN2
F9
T
R
AC
K2
D8
VOU
T
2S
C8
VI
N
M2
VI
N
M3
VI
N
M4
VI
N
M5
VI
N
M6
VI
N
M7
VI
N
M8
VI
N
M9
VI
N
M1
0
VI
N
M1
1
VI
N
L2
VI
N
L3
VI
N
L4
VI
N
L5
VI
N
L6
VI
N
L7
VI
N
L8
VI
N
L9
VI
N
L10
VI
N
L11
VIN
K2
VIN
K3
VIN
K4
VIN
K9
VIN
K10
VIN
K11
VIN
J2
VIN
J3
VIN
J4
VIN
J9
VIN
J10
VIN
J11
GN
D
A6
GN
D
A7
GN
D
B6
GN
D
B7
GN
D
D1
GN
D
D2
GN
D
D3
GN
D
D4
GN
D
D9
GN
D
D1
0
GN
D
D1
1
GN
D
D1
2
GN
D
E1
GND
E2
GND
E3
GND
E4
GND
E10
GND
E11
GND
E12
GND
F1
GND
F2
GND
F3
GND
F10
GND
F11
GND
F12
GND
G1
GND
G3
GND
G10
GND
G12
GND
H1
GND
H2
GND
H3
GND
H4
GND
H5
GND
H6
GND
H7
GND
H9
GND
H10
GND
H11
GND
H12
GND
M12
GND
M1
GND
L12
GND
J1
GND
J5
GND
J8
GND
J12
GND
K1
GND
K5
GND
K6
GND
K7
GND
K8
GND
K12
GND
L1
SGND
C7
SGND
D6
SGND
F6
SGND
F7
SGND
G6
SGND
G7
F
SET
C6
PH
ASM
D
G4
DI
FFP
E8
DI
FFN
E9
CLK
OUT
G5
MO
DE
-PLLIN
F4
TEMP
J6
IN
T
V
C
C
H8
EXT
VC
C
J7
DI
FFO
UT
F8
CO
UT
2
0
100uF 10V
1210
CO
UT
2
0
100uF 10V
1210
CIN1
2
22uF
25V
1210
CIN1
2
22uF
25V
1210
+
CO
UT
2
3
470uF
4V
7343
+
CO
UT
2
3
470uF
4V
7343
C1
8
2.
2uF 10V
C1
8
2.
2uF 10V
R4
2
(OP
T
)
R4
2
(OP
T
)
R3
9
121K
1%
R3
9
121K
1%
R4
1
10K
R4
1
10K
R4
3
121K
1%
R4
3
121K
1%
CO
UT
2
2
(OP
T
)
1210
CO
UT
2
2
(OP
T
)
1210
CIN1
5
22uF
25V
1210
CIN1
5
22uF
25V
1210
R4
4
(OP
T
)
R4
4
(OP
T
)
CO
UT
2
1
(OP
T
)
1210
CO
UT
2
1
(OP
T
)
1210
CO
UT
2
4
100uF
10V
1210
CO
UT
2
4
100uF
10V
1210
CIN1
1
1uF
25V 1210
CIN1
1
1uF
25V 1210
+
CO
UT
2
9
470uF
4V
7343
+
CO
UT
2
9
470uF
4V
7343
R4
0
0 O
h
m
R4
0
0 O
h
m
CIN1
4
22uF
25V
1210
CIN1
4
22uF
25V
1210
ϭϲ
SW
2-
3
ϭϲ
SW
2-
3
